Bobbin for machines for the manufacture of pillow-lace.



-A. MATITSCIL BOBBIN FOR MAOHINES FOR THE MANUFACTURE OF PILLOW LACE.

APPLIGATION FILED NOV.18, 1912.

1,1 13,671. Patented-Oct. 13, 1914.

IIIF NORRIS PETERS 6b.. PMOTILLITHQ. WASHINGTON, r). c,

mvrrnn STATES PATENT OFFICE.

AUGUST MATITSGH, OF NOTTINGHAM, ENGLAND, ASSIGNOR T0 THEFIRM & 00., OFVIENNA, AUSTRIA-HUNGARY.

or FABER BOBBIN FOR MACHINES FOR THE MANUFACTURE OF PILLOW-LACE.

Specification of Letters Patent. Patented Oct, 13, 1914.

Application filed November 18, 1912. Serial No. 732,045.

To all whom it may concern:

Be it known that I, AUGUST MATITSCH, a subject of the Emperor ofAustria+Hungary, residing at Nottingham, England, have inventedImprovements in Bobbins for Machines for the Manufacture of Pillow-Lace, of which the following is a specification.

In machines for the manufacture of pillow lace slight shocks occur, inthe same manner as in bobbin net lace making machines, during themovements of the bobbin slides through the combs at each reversal of themovement. These shocks are trans mitted to the bobbins of the slides andcause them to continue to rotate with a step by step motion. Whereashowever in the bobbin net lace making machines these shocks take placealternately in opposite directions and therefore mutually neutralizeeach other in their action on the bobbins, it is necessary in pillowlace making machines to always put certain of the slides out of actionduring a number of successive revolutions and therefore hold them backin one and the same outer comb so that in consequence the bobbin of aparticular slide receives an impulse in the same direction at eachrevolution. When the impulses cause the bobbin to rotate each time inthe direction in which the thread is unrolled the bobbin thread will beslackened, owing to the continuous rotary motion of the bobbin, duringits exit from the slide in such a way that it will curve in anydirection and form a long loose loop which is apt to catch in aneighboring slide so that the bobbin will be pulled out of its slide. a

By means of a holding spring which acts upon the slide bobbin and as iswell known acts differently upon the bobbin according to whether it isfully wound or has had a somewhat large amount of thread unrolled fromit, it is impossible to prevent the bobbin from continuing to rotateowing to the shocks to which the slides are subjected when theirmovements are arrested. B means of a second spring placedin the slide itis possible to prevent the thread from coming up out of the slide afterit has been unwound by the said rotation of the bobbin particular butthe thread is still able to project from the side ofthe bobbin and thebefore men tioned injurious loop formation still takes place.

According to this invention, for the purpose of obviating the saiddisadvantage the periphery of each bobbin is polygonal in shape so thatthe braking action of the holding spring that bears thereon is renderedmore efficient than if the periphery were cylindrical, and theformation, owing to shocks arising during the movements of the bobbinslide, of a loop in the length of thread passing from the bobbin to theclamping spring, is prevented.

Figure 1 of the accompanying illustrative drawing shows a bobbinaccording to this in vention detached from its slide. Fig. 2 shows thebobbin inserted in a bobbin slide.

.The bobbin 8 has a polygonal periphery which form renders moreefficient the braking action of the pressure spring (Z which has one endso fixed in the slide a that its free end bears on the said periphery tosuch a degree that when the tension thereof is correct the corners ofthe bobbin cannot rotate under shock past the spring. The unwinding ofthe thread which is caused by the shocks is then so slight thatloosening and emergence of the thread under the thread hole in the formof a loop and con sequently the pulling of the bobbin out of its slidecannot take place. i

It will be noted that the corners formed by the polygonal shape of thebobbin periphery act on the holding spring 0? as teeth or very slightprojections to retard the rotation of the bobbin in its seat in theslide or carriage.

I claim- 1. A thin lace-machine bobbin, whose edges are provided with a.large number of projections, in combination with a retaining springarranged to engage said edges, the limit of idle motion being determinedby the distance between said projections.

2. A thin lace machine bobbin having polygonal endsof many sides incombination with a retaining spring andin frictional engagement with abobbin carriage.

3.. A thin lace machine bobbin having polygonal ends, the corners-ofsaid ends op- 5. A lace machine bobbin having polygoerating as rotationretarding means and the nal ends and approaching a circle in shape. 1(length of the sides proportioned in accord- Signed at Nottingham Englandthis ninth ance'with the permissible slack. day of November 1912.

5 4. The combination of a lace machine car- AUGUST MATITSCH.

riage having a circular bobbin seat, of a Witnesses: bobbin thereinhaving polygonal ends and HORACE BUNN,

a spring engaging the edges of said ends. Tnos. H. Coon.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of latems,

Washington, D. G.

